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Finding the Fourth Proportional to 8,485.35, 11,709.78 and 4,709.13

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Solution

The fourth proportional to 8,485.35, 11,709.78 and 4,709.13 is: 6,498.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,485.35 : 11,709.78 = 4,709.13 : x
  2. Step 2: Convert to fraction form
    8,485.35/11,709.78 = 4,709.13/x
  3. Step 3: Cross multiply
    8,485.35x = 11,709.78 × 4,709.13
  4. Step 4: Simplify right side
    8,485.35x = 55,142,876.29
  5. Step 5: Solve for x
    x = 55,142,876.29/8,485.35
  6. Step 6: Final answer
    x = 6,498.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.